Valve



J. B. KNUDSEN.

VALVE.

APPLI'CATION FILED JAN. x9, 191s.

1,326,938, Patented Jan. 6, 1920.

i0 Z a 50 Q STATES JACOB IB. KNUDSEN, OF CHICAGO, ILLINOIS, ASSIGNOR OFONE-HALF T0 FRANCIS H, QUAIL, OF CHICAGO, ILLINOIS.

VALVE.

Application filed January 19` 1916.

To all whom t may concern.'

Be it known that I, JACOB B. KNUDsnN, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented new and useful Improvements in Valves, of which the followingis a full, clear, concise, and exact description, reference being had tothe accompanying drawing, forming a part of this specification.

My invention relates to valves, and more particularly to valves for usein the confinement of gas under pressure.

It is one of the objects of my invention to provide a packless valve inwhich the danger of leakage, either through the bonnet or the outlet, isremoved.

I have described in the following specilication and illustrated in theaccompanying drawings embodiments of my invention, it being understoodthat changes maybe made in the form, construction and arrangement of theparts Without departing from the spirit of my invention or exceeding thescope of the appended claims, the forms herein disclosed being merelypreferred embodiments thereof.

In the drawing- Figure 1 is a vertical cross sectional vieW of a valveconstructed in accordance with my invention;

Fig. 2 is an enlarged cross sectional vievv of a portion of Fig. l,thesection being taken on the line 2-2 of Fig. 1, looking in thedirection of the arrows; and

Fig. 3 is a vievv similar to Fig. 1 showing a modified form of the valvemember there shown.

Referring to the drawing, 5 represents the receptacle in which the gasor other fluid is confined and which has an enlarged portion 6 throughwhich is a central threaded opening to receive the threaded arm 7 of thevalve casing 8. The latter is a casting substantially in the forni of a.Greek cross, the four arms of which may be designated, for convenience,as the inlet, outlet, safety out let and bonnet arms. Through the inletarm 7 is a passage 9 Which has communication with the interior of thereceptacle 5 by means of a plurality of ports 10 formed in a washerlikemember 11 which is in screw threaded connection With the arm 7 and hasan outturned flange 12 bearing against the end of the latter member.

.Speccation of Letters Patent.

Patented Jan. 6, 1920.

Serial No. 73,005.

In communication with the passage 9 are the discharge port and a safetyport. Opening into the passage 9 and forming, in effect, a continuationthereof, and of a cross section substantially smaller than the same, isa passage 13 through the casing member and opening into a centralchamber 14 into which also opens a passage 15 communieating With thedischarge port 16. This port and passage are in the outlet arm 17 of thevalve casing 8 this arm being subs antially at right angles with theinlet arm 7. The end of the outlet arm 17 is screw threaded forengagement With a receiving tank or the like.

Diametrically opposite the outlet arm 17 is the safety outlet arm 18,screw threaded at the end to receive a cap 19 in which is a safetyoutlet communicating with a pas sage 2G, which in turn communicates Witha passage 21 opening into the main passage 9, the outlet being closedlby a thin strip of copper 22 or other suitable substance designed toblow out in case the pressure in the receptacle becomes in excess of apredetermined amount.

Slidably embraced by the Washenlike member is a valve stem 23 which hasan enlarged portion 24 and a flange 25 on Which is a washer 26 of fiber,rubber or other suitable material. This flange and its Washer constitutethe valve proper which engages a shoulder 27 formed in the valve casingat the point Where the restricted passage 13 and the main passage 9meet,` said shoulder forming in effect the valve seat. Beyond the Washer26 the valve stem has a frusto-conical p rtion 28 which is at its baseof a cross 4section substantially equal to that of the passage 13, sothat when the valve is displaced away from its seat the opening for thepassage of the gas will gradually increase in extent. At the end of thevalvestem beyond the truste-conical portion is a, cylindrical head 29which fits snugly but slidably into the passage 13 and which is providedin its side with a plurality of `grooves 30 (in this instance, four)running from end to end, whereby the flow of gas when the valve isopened is more or less restricted inasmuch as the gas can pass into thecentral chamber 14 only via these' grooves. The valve is normally heldclosed againstits seat by a coiled spring 31 Which bears against theange 95 ofthe valve stem and against the washer-like member 11, and bythe pressure oi' the conned gas. lt is opened by means now tobedescribed.

The bonnet arm or the casing member 8, which is the arm diametricallyopposite the inlet arm 7, is formed with a chamber in its outer end andfrom the bottom or this chamber' to the central'chamber 14 isath'r'ea'de'd bore, in which operates a threaded stem 32. The latter, aswill be seen by the drawing, extends into the` centralchamber 14, .andit is Aformed with a pointed end 38 which is received'by a depression intheend of the valve stem head 29. At the other end, this threadedI stem32 extends beyond the end of the ,casing arm and terminates ina squaredend34. `The latter is engaged by a squared socketormed in theA end of anintermediate operating and guide member 35 embraced with-in. n lthreaded'to be screwed over the threaded end of the' casing arm asclearlyappears in Fig. 1. The member 35 has a downward extension in theform of a sleeve 35a` which rsurrounds the threaded stem and provides` afurther guide ior the same. 'lheendl of this sleeve enters and rotatesina suit'able'groove formed in the bottom, or the casing arm chamber.`Toprovide proper joints the bonnet 3,6 has ashoulder bearing against theend of ythe casing arm, the shoulder being providedrwith an annulargroove to receive. a corresponding annular ridge on the end of the.casing arm. n

The intermediate operating member 35 has a Central shank extendingoutward throughl an opening in the head 37 of the bonnet'. andterminating in a squared end 38 which is engaged by a squared socket inthe end or anyoperatin-g `member 39. The latter is rotatablyembracedwithin a cap 40 whichis in threaded connection with the end of the bonnot .36. `The cap 40 has an inwardly abutting shoulder engaging` aflange 41 onl the inner end of the operating member 39 ,whereby thelatter is held down against the bonnet head 37. The end Vof the cap 40is open and an annular space provides accessy to the squared end 42 ofthe operating member 39 wherebyy the latter may be turnedjby` means orasuitable wrench or other instrument.

lnthe .intermediate member 35 a shoulder is Jformed by reason of theshank, .and the face of the shoulder is provided with a pluralityl ofconcentrically arranged teeth 43. lnterp'o'sed between this shoulder andthe head 37 of the bonnet is a washer 44,*which is Apreferably or ametalv softer than the metalcomprising. the engaging member so that whenthe shoulder bears against washer the teeth 44 are forced into thesofter metal and )ormv in eii'ect a plurality of ground joints. Themember 35 is held firmly up, against thel washer l43. and thereby clampssame against the bonnet head-by means the the bonnet 36 which issuitablyA of'a coiled spring 45 which surrounds sleeve 35a inthe chamberor the casing arm, and which'bears againstthe' bottom'thereofand againsta .washer 46 engaging the member 35. This spring will maintain a tightjoint, thus edectually preventing leakage in the bonnet.

When the operating member 39 is rotated by awrench the motion istransmitted tothe member 35 and lthence to the threaded stem 3Q as willbeapparent. The latter member will have also an end/,wise movement, thesquared end y34 thereof sliding in, its'guide formed `by the socket inthe member 35 and the sleeve 35a. This movement or the threaded stem istransmitted to the valve stem by reason oftheir abutting ends, thusforcing the valve member, against the pressure of the spring andtheconnedigas, away from it's'seat and so permitting the gas to new tothe discharge port. This flow ho\.vever not be sudden andf unrestricted,tor, owing to the truste-conical shape ot the valve stem, the opening atfirst is very slight and only* gradually wid-ens as the stem isgivenrurther displacement. Even when the valve iswide open the gas isstill restricted in its flow reason of the fact that its path is throughthe grooves 3() in the head1 29.

The valve is closed by turning the operating member 39 in the oppositedirection, this motion being` transmitted to the connecting member andthence` to the threaded stem, thus withdrawing. the latter `whichpermits thel valve member to return to'4 seating position' undertheforce ofthespring 31, or that togetherfwitliy the pressure of thegas, in case any remains.

In Fig. 3 l have disclosed a modification or my4 invention which has aground valve memberinstead of .thev flange seating member abovedescribed. The enlarged portion 24 of the valve stem 2? has a flange 50with a downturned edge 51, .the coiled spring 31 bearing ,against thisflange. Beyond the latter the valve stem is rusto-concal in shape., thebase being of Vav cross section substantially greater than thatl of thepassage 13, so that as the spring' 31 and the gas pressure force thevalve' againstV the edge oi the shoulder, the ground conical surfaceeffec tua'lly closes the passage. In other respects this form ,of theinvention is like the form just desori'bed.

. The construction or the bonnet and its associated parts is such astoprevent leakage in thebonnet when'gas is flowing. Fun therniore, leakage:tromthe receptacleis prevented ;eii'ectively because; of the valveconstructionwand ,the fact y that itV is opened a gain tlthe pressureand held shutin amanner h thatfthe vilessure aids rather than op.1 oses,instead orbeingi mechanically held closed 'against the pressure. And itwill be noted that ,the greater the 4pressure thev more firmly the valvevis held against its seat. As

a result of such a construction there is no strain on the threads of thestem 33 so that the latter will not work loose, and the consequentnecessity of frequently tightening the operating member is removed. Alsothere are no parts or joints to become loose by the jarring and roughhandling which the receptacle is likely to undergo in transportation andthe like. So it will be seen that by my invention I have provided apackless, non-leakin g valve, a valve in which the operating member ismounted on the bonnet independent of the valve stem, and one in whichsudden and unrestricted flow of the fluid confined is prevented.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent is l. In a pressure tank valve the combinationwith a valve casing of a removable bonnet therefor, a valve seatinglwith the pressure mounted in said casing, a threaded stein bearing atits lower end on the valve stem and having an irregular shaped upperend, a rotatable member in the bonnet having a shoulder at its upper endseating on an interior shoulder on the bonnet and provided with anirregular shaped extension projecting through the bonnet, said memberhaving an irregular socket for the reception of the irregular end on thethreaded stem and a rotatable vertically stationary operating membermounted on the bonnet and having an irregular socket for the irregularshaped end oi said rotating member.

2. In a pressure tank valve, the combination with a valve casing of aremovable bonnet therefor, -a valve seating with the pres sure, a stemthreaded in said valve casing and having an irregular shaped upper end,a rotatable member in the bonnet having a shoulder at its upper endseating on an interior shoulder on the bonnet and provided with anirregular shaped extension projecting through the top of the bonnet,said member having an irregular socket for the reception of the end ofthe threaded stem, a coiled spring for holding the shoulder on saidrotating member seated, a rotatable, vertically stationary operatingmember mounted on the bonnet and having an irregular socket for theirregular-shaped eXtension of the rotating member, the valve stem andthreaded stem being structurally disconnected but operatively connected.

3. In a pressure tank valve, the combination with a valve casing havingan enlarged recess in its lower end communicating with an exit passage,a valve member mounted in said enlarged recess andy having afrustoconical portion extending into the exit passage, a shoulder onsaid valve, a closure plug for said recess having apertures for thepassage of the tank contents, a downwardly extending stem projectingthrough said plug and g'uiding said valve member, a coiled springinterposed between the shoulder on said valve and said plug for holdingthe valve in position, an upwardly projecting extension on said valvemember, a threaded stem mounted in said casing having its lower endbearing upon said extension and having an irregular shaped upper end, abonnet for said casing, a rotatable member in said bonnet having ashoulder at its upper end seating against an interior shoulder in saidbonnet and provided with an irregular shaped socket for the reception ofthe irregular .shaped end of the threaded stem, a coiled spring holdingthe shoulder on said rotatable member in seated position, said rotatablemember having an irregular shaped proj eetion extending through thebonnet and a vertically stationary rotatable operating member mounted onsaid bonnet and having an irregular shaped socket for the reception ofsaid irregular shaped projection on the rotatable member.

In witness whereof, I have hereunto subscribed my name in the presenceof two witnesses. v

ALBERT R. VmsE, A. E. RosENTHAL.

